They'll either discover their long-lost cousin in the other corner of the room and run over and talk to them. Or they'll suddenly become parched and/or hungry, and often both, and sprint off for a drink and some food.
O descubrirán a un primo perdido en la otra esquina de la habitación y correrán a hablar con él, o de repente se sentirán sedientos y/o hambrientos – a menudo ambas-- y correrán a por un trago y algo de comida.